Hebrews 6:13-16 English Revised Version (ERV)

13. For when God made promise to Abraham, since he could swear by none greater, he sware by himself,

14. saying, Surely blessing I will bless thee, and multiplying I will multiply thee.

15. And thus, having patiently endured, he obtained the promise.

16. For men swear by the greater: and in every dispute of theirs the oath is final for confirmation.

Hebrews 6